After some serious threats by North Korea, the United States has sent stealth fighters to South Korea to aid in their defense.

Tensions are high in both North and South Korea right now. According to Reuters, North Korea is on the brink of a nuclear attack after the United Nations sanctioned them for doing nuclear tests earlier this year.

South Korea says that if North Korea does attack them, they are fully prepared to strike back. North Korea said on Saturday that they were entering a state of war with South Korea for the 'hostile' military drills that South Korea was running with the help of the United States.